Hello here is a solution :
37.5% of what is 81...
0.375x = 81
x = 81/0.375
x = 216....so there is a total of 216 muffins
Answer: tacos cost $2.50
Step-by-step explanation: X symbol for taco Y symbol for burrito
4x+2y=21
4x+3y=26.50
Multiply first row by -3. -12x-6y= -63
Multiply 2nd row by 2. 8x+6y=. 53
The Y's cancel. -4x. = -10
Divide by -4. X= 2.50
Combine like terms : 2 = p - 8
Add 8 on both sides : 10 = p
Hope this helps.